Chuck for machine-work.



2 SHEETS-SHEET 1.

Panented 0011.4, 1910.

H. O. EVANS. CHUCK FOR MACHINE WORK.

APPLIUATI'OI mum MAY 19. 1909.

0 1 9 1 4 t 0 0 d w m a P H. 0. EVANS.

CHUCK FOB MACHINE WORK. nruouxon FILED KAY '19. 1909 2 SHEETS-SHEET 2.

IIIVENTDR WITNESSES ATTORNEYS mnrnn simples PATENT OFFICE.

HENRY O. EVANS, OF DETBQIT, MICHIGAN.

CHUCK FOB MACHINE-WORK.

To all whotrjuit may concern:

- Be itjknown that I, I'IENRY 0. Evans, a citizen of the United States, residin in the city of.Detroit, county of Wayne, tate of Michigan, have. invented a new and useful Chuck for Machine-Work, of which the following is a specification.

. This invention relates toa' chucking mecha- Inism' of the type designed to hold a part a the machine.

to-be machined and more particularly such parts. as are-to be drilled, tapped or the like. It has for an object'to provide a chuck which will automatically and accuratel center the art to be machined, one whic is adjustab and whereb one and all fittings adapted to be use therein may be placedin' the chuck without danger to the operator in case of premature starting of It is well known in tapping or drilling of small articles that one operator'g'enerally takes care of a number of machines and passes rapidly from one to the other to re-- operation the safety of the-operator is pro-' 4o wherein the parts or fittings to be machined move the com leted part or adjust the pan to be operat upon; 1 In chucks as heretofore constructed the osition' of the same: relative to the taps, drills or the like has been rigid or not capable of adjustment for centering thepart's,

H1 of such construction as to make it nearly impossible to insure safety to the operator in placin the parts in the chuck, while if the machine is stopped during the chucking tectcd, permitting him to chuck quickly and safely and to start the machine immediately on completion of chucking, thus saving valuable time.

In my present device I provide a chuck may he placed with absolute accuracy and safety to the operator, one which cooperates with the operating mechamsmcf the drill- I 'ing or tapping machine, as the case may be,

to actuate stopping mechanism, whereby the machine is brought to a standstill at the completion of a workii'ig movement and one in which the machine is started at the time a new part is placed in the chuck for a cutting operation. Furthermore, by my novel chuck an automatic adjustment of accurate center is made possible and Whether the tapsor drills are operating vertically l or horizontally or both, the part being Ina- ,ehined is accurately centered. It further consists of other novel features Specification ct Letters Patent. Application filed Mar 19, 1909. Serial No; 497,038.

Patented ocaa, 1910.

of construction, all as will "be hereinafter fully set forth. I

.For the purpose of illustrating my invention I have shown in the accompanying drawings one form thereof which is zit-pres?- ent preferred by me, since the same has been found in practice to give satisfactory and reliable results, although it ism be understood that the -.vario us instrumentalities of which my invention consists can be variously arranged and organized and that my invention is'notlimited to the 'precise arrangement and organization ofthese instru'mentalities as -herein shown and. described. i

I Figure .1 represents agsection-al side elevationfo f a chuck cmbodying'fmy"invention.

Fig. 2 represents a'planofaportion of the same. Fig. -3 represents alsection on line Hot Fig. 1.f; Similar il lllmfii'als.bf reference indicate correspondmg-parts inthe figures. P

Referring tothedrflvihg'sz-l designates,

in the present instancqthe' main frame of a tapping machine, to which is fixedly'fsecured m any e ir aanmherfatplite a; f'rovided; Y

with, outwardly cc-ting agnge 3, through which latter an" a justing screw 4 is adapted to ass and with parts to 'be hereina p r Y i This jplate 2 is provided, in the present instance, with a dove-tailed slot 5 serving as a guide way for a projection 6 forming a part of'a laterall extending bed 7 servm' as a mainsupport for my novel chuck mec anisni. i This chuck mechanism consists of a table 8 mounted for sliding movement upon vthe bed 7 which movement in the present instance is .per-

mitted by a suitable dove-tailed joint 9 between the two parts, adjustment ofwhich is preferably controlled by suitable bolts 10 passing through lugs 11 secured-toor form f mg a part of-the bed 7. The table '8- is, pro

vided with a longitudinally formed "groove- 12, within which thecarriage 130i the chuck is adapted to fit, the samebeing maintained therein in normal operation by' mjeansiof keys l tsecured to thetable 8 and engag n ways. 15 of the carriage 13. It will nowbe just-ed longitudinally of the table-8 and thus.

permit morement of the chuck mechanism in one direction relative to the tapping mechanism, while the table 8 may be shifted transversely through the medium of the sliding connection 9 to vary the relation of the apparent that the-carriage 13 may. be ad-.

chuck in a transverse direction relative to f,the carriage 13 by an adjustable connecthe tapping mechanism and as the bed 7 tion, consisting of a bolt 39 and lock nuts may be moved in the plate 2 to shift the j 40. The chain 37 is here shown as passing chuck in a vertical direction, it will'be seen over a puide pulley 41 and .is secured to a 5 that all possible adjustments are accurately treadle ever 42, which latter carries a eounllowed terwcight 43 for ease of operation and cor- The carriage 13 has preferably formed on rect balancing of the different parts.

one end an upwardly extending vface 16 pro- 44 deslgnates a bolt sultably threaded into vi'ded with a suitable shoulder 17 in order the lug 38 and i nalinement with the bed 7,

that one jaw-i8 of the chuck may be properly W P R Whlch to 'act as 5130p 75 positioned therein, the same jaw being sethe carriage 13 to limit the movement of cured in any well known manner thereinfi @41 C ck mechanism nd properly position The'opposite jaw '19 of the chuck is simie ame relatlveto the tapping or drilling larly mounted in a head 20 which is suitably IHQOhaQISm- I W ll Of ourse be understood secured upon the carriage 13, preferably h t s t h 9 nuts 45 Y mounted e 80 through the medium of a dove-tailed joint Q to q h m he S me 1n adjusted posi- 21, seen in Fig. 3. In order to operate th tion and 1t.1s preferable to adjust this bolt head relative to, the face 16 1 provid i 44 so that there is a slight clearance which the present instance, a bolt 21 screw thread- Permlts the Chuck g a little r e back,

20 ed i t th member 20, th idb lt pass. if necessary, and thus allow a fioa-tingaction ing through a threaded bushing 22 havin so hat the taps may strike the fitting and; cars 23 thereon suitably s aced apart-to autqmatlcally l for c ine'op v receive a hand lever 24, w ich is secured eratlon- I. thereto by a,pivot-25. Encircling the bolt In operation, assuming theprts to be .g5;-.21*, is a spiral spring 26 normally held as shown in Fig. 1, if it is desired to remove 90 m place by a block 27, in the present 'in- 1 h? 1306, 811 'ore'par l' fipp stance mfiu'gtably secured upon th boll; 8.8 the 02138111815 befthefo 61121201 ..-g1r. mw f a set screw 23 d raises the hand lever 24, thereby iti d l ti .t th b r 20 as t the member'20 and jaw 19 to permit the sai 30 allow sufiqc ent clearance space for proper P op ut. l 'in his operation 95 operation of the parts. It will-likewise be this? bell crank member 31 i 'r l to properly adjust the partsfor o engage t e pin 36 andaoontinued upward a clearance space between the bolt head 29 m V mBIIt of. the hand lever 24 reduces i and the bushing member 22 in order to allow movement of the carriage 1,3 in t e ways of the jaw 20 movement suflicientto hold so. the frame 7, thus removing the 'entitre chuck -100 cure y and automatically partsof varying hour the path of movement-of thetapping size, other chucks requiring manual 'adjusta m- Whenthe parts ment. The hand lever 24has secured there- 'h r f thi position, ,Whi h th y do to by means of a pivot 30, one end of a bell allnost lmmediately, the operation just del 40 crank 31,which latter is'm'ounted upon the scribed being acontinuous'one, a new tee, 105

13 by means of a pivot 32, whereby ell or penis-placed between the jaws 19imd 1t clear that when the parts ar in .20 an the operator returns the hand lever the positlon seen in Fi I with the jaw 19 2 Q' IEi P i n deprms the ng a tee, ell or t 11ke,the spring 25 foot tree e 42, whereupon the carriage 13 a under tension sufiicient to'ca'use-a and the parts carried thereby are shifted 11 Illck and instant release of the parts when directgiillto (iol'l'ec't Position 115116111611? e 18V6I's24i8 raised 2 with e ta sand drills; which position, as Attention is directed to a. collar 33 which det y the adjustment Stop, n th is threaded upon the bushing 22 and acts as l starts' In. manner one i a stop to adjust the opening of thechuck at lm afieli another 15 care-0f by a n5 my predetermined distance,so that any tend smgle 9p h p a11d in ency of a part to turn and open the jaws is P g a mlmmum 0 time and i1 y I pyercome. Oneendrof the bell crank 3-1 has of 19 3 In removing R plvoted thereto an arm'34 rovided with an 9 the machllle 1S Operation is entlibl' Op'en-ended slot 35 adapt to en a a i elunmated. i v 120 .36, whichis securedto th fr 7, It, 111 Particular attention is' directed to the be seen that when the arm 34'is shift so? a yadjus men s for ccurate tap ing, that the pin is engaged by the end of the since the free floating movement 0 slot :35, e. leverage is producedwhich operchuck p m a three-way mfivement'fm ates to shift the carriage 13 and thereby bringin the fitting'into ahnement and cen bring the entire chuck mechanism/out of th ter of t e operating mechanism, which re .lme of the tapping In 0rder- Sll-ltS in an accurate OQHtlOllillg 01 tapping to return the carriage 13 to normal position of h hole, as'the case m y v I disclose m the present instance, a chain It will now be apparent that I have de- 37 or equivalent device to 2. lug 38 vised a. novel and usefulconstruction which embodies the features of advantage enumer ated as desirable in the statement of the invention and the above description and while I have in the present instance shown and described the preferred embodiment thereof which has been foundin practice to give satisfactor and reliable results, it is to be understood that the same is susceptible of modification in various particulars without departing from the spirit-or scope of the invention orwsacrificing any of its advantages.

H avin thus described .my invention, what I c aim as new an desire to secure by Letters Patent, is

1. In a device of the character stated, a table, a carriage slidingly mounted thereon provided with a jaw member, a second jaw mounted on said carriage for movement relative thereto, a spring operativel secured to said second jaw, a lever pivotal y mount ed on said carriage, and connecting means between the said spring and lever, whereby the lever opens said jaw when moved in one direction and releases said jaw to the action of the spring when moved in the opposite direction.

2. In a device of the character stated, a

carriage, a jaw carried thereby, slidingly pivoted nected to said lever,

a second jaw mounted ad acent thereto, a lever a member secured to said second jaw and having sliding engageto said carriage, a bushing c0n-- counted adjacent thereto, a lever' member to impart movement of said lever in one direction-to said second jaw, a spring between said lever and'said member, and means to adjust the tension of said spring.

HENRY o. EVANS.

Witnesses:

EDWIN WAL'rz, A. L. SHAMBLEAU. 

